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Proceedings of the 1995 International Symposium oh High Performance Steels for Structural Applications ASM Materials Week '95, Cleveland, OH. This book provides solutions for meeting the demands of designers and end-users for high performance structural steels used in bridges, buildings, off-shore platforms, construction and mining equipment, ships and railroad cars. Papers focus on carbon, alloy and stainless steels, both designer and end user perspectives, as well as thermo-mechanical control processing, welding and weldability, and microalloying.
Proceedings of the July 1996 symposium, with sections on alloy development, microstructural evolution, forgeability and process design, and performance and applications. Highlights recent advances in thermochemical processing methods such as high temperature flow strength and post forged cooling, property evaluation, and the use of alloys for specific applications, focusing on the role of titanium, molybdenum, and sulfur. Topics include the influence of austenite condition on bainite transformations, and microalloyed forgings for large diesel engine components. No index. Annotation copyrighted by Book News, Inc., Portland, OR
George Krauss, University Emeritus Professor, Colorado School of Mines and author of the best-selling ASM book Steels: Processing, Structure, and Performance, discusses some of the important additions and updates to the new second edition.
Today, most bearings for automotive transmission operate in an environment of severe debris contaminated lubrication. Thus, to develop the bearings that have a long life under the lubrication environment, micro-alloyed forging steel with a vanadium element based on medium-carbon steel and a carbonitriding heat-treatment process have been developed. Initially, the variation of grain size caused by an amount of aluminum and nitrogen was investigated. The hot deformation behavior was evaluated by means of a Gleeble tester. In general, it is extremely difficult to obtain sufficient nitrogen in the case-hardened layer by a conventional carbonitriding process. However, the application of the newly developed steel has not only the increment of nitrogen content in the case-hardened layer, but also the additional benefit that heat treatment costs could be cut effectively. In addition, we have investigated the retained austenite and precipitation behavior of V(CN), and the evaluated rolling contact fatigue life of a heat-treated specimen. As a result, we identified that the fatigue life of developed steel samples, under contaminated lubrication environment, is about five times better than comparative steel. The micro-structural degradation mechanism during fatigue testing was elucidated.